When a body starts from rest or it changes it direction of motion,it is called as initial velocity. We generally consider initial velocity is equal to zero (u=0),only when the object starts from rest. Generally at time (t=0),the initial velocity is zero.
Is the initial velocity of a projectile always 0?
When a projectile reaches maximum height, the vertical component of its velocity is momentarily zero (v y = 0 m/s). However, the horizontal component of its velocity is not zero.
Why is initial vertical velocity zero?
(c) The velocity in the vertical direction begins to decrease as the object rises. At its highest point , the vertical velocity is zero. As the object falls toward Earth again, the vertical velocity increases again in magnitude but points in the opposite direction to the initial vertical velocity.
What is always the initial velocity?
Question: Initial velocity is always equal to zero .
Why is initial velocity not zero?
If you choose to start looking when something is already moving, that object will have an initial velocity that is not zero. For projectiles, as Arturo mentioned, we tend to start looking at an object after it has been launched, and already attained some speed, so it has a non-zero initial velocity.
Is final velocity zero?
People mistakenly think the final velocity for a falling object is zero because objects stop once they hit the ground. In physics problems, the final velocity is the speed just before touching the ground . Once it touches the ground, the object is no longer in freefall.
How do you know if the initial velocity is 0?
When a body starts from rest or it changes it direction of motion ,it is called as initial velocity. We generally consider initial velocity is equal to zero(u=0),only when the object starts from rest. Generally at time (t=0),the initial velocity is zero.
What is difference between initial and final velocity?
Initial velocity describes how fast an object travels when gravity first applies force on the object. On the other hand, the final velocity is a vector quantity that measures the speed and direction of a moving body after it has reached its maximum acceleration .
What is initial velocity and final velocity?
Dear student. Initial velocity is the velocity which the body has in the beginning of the given time period and final velocity is the velocity which the body has at the end of the given time period.
How do you find initial velocity without final velocity?
- v stands for Final velocity.
- u stands for Initial velocity.
- a stands for Acceleration.
- s stands for Distance.
Is initial velocity equal to final velocity?
Final velocity (v) of an object equals initial velocity (u) of that object plus acceleration (a) of the object times the elapsed time (t) from u to v . Use standard gravity, a = 9.80665 m/s 2 , for equations involving the Earth’s gravitational force as the acceleration rate of an object.
Can initial velocity be negative?
Velocity. ... Since the final position of the object (rfinal) may be either positive, negative, or zero, and either larger, smaller, or the same as the initial position (rinitial), the velocity may be positive, negative, or zero. The sign of the velocity depends on the coordinate system chosen to define the position.
Can velocity be negative?
An object which moves in the negative direction has a negative velocity. If the object is slowing down then its acceleration vector is directed in the opposite direction as its motion (in this case, a positive acceleration).
Is the initial velocity is zero then the force acting is?
Now a constant non-zero force is applied on the particle in direction opposite to its initial velocity. ... After the force is applied, the net work done by this force may be zero in certain time intervals.
Can the velocity ever be the same as the initial velocity?
c ) Velocity will never be the same as initial velocity because constant force of gravitation is acting on the projectile all the time.
What is Y in free fall?
When the object comes in contact with the ground or any other object, it is no longer in free fall and its acceleration of g is no longer valid. Under these circumstances, the motion is one-dimensional and has constant acceleration of magnitude g. We represent vertical displacement with the symbol y.
